/Engine/Plugins/Experimental/Web/WebAPI/Source/WebAPIEditor/Public/WebAPIDefinition.h
Retrieves the custom data for the given key, or creates it if it doesn't exist.
[UObject](API\Runtime\CoreUObject\UObject\UObject) * AddOrGetImportedDataCache ( [FName](API\Runtime\Core\UObject\FName) InKey, const [TSubclassOf](API\Runtime\CoreUObject\Templates\TSubclassOf)< [UObject](API\Runtime\CoreUObject\UObject\UObject) > & InDataCacheClass )